Pope Callistus II "the Holy"

Pope Callistus II "the Holy" (15 June 1041-), born Stentore di Crivelli, was Pope from 21 November 1087, succeeding Pope Alexander II.

Biography
Stentore di Crivelli was born on 15 June 1041 in Italy, and he became a bishop and a cardinal under Pope Alexander II. Di Crivelli took part in the First Crusade of 1084, and he was consecrated Pope on 21 November 1087 while commanding troops in Teluch in Asia Minor (now known as Gaziantep, Turkey). "Pope Callistus II" was 46 years old upon becoming Pope, making him fairly old for a battlefield commander. However, he would succeed in Christianity's campaign to reconquer Jerusalem from the Fatimid Caliphate, leading to the creation of the Kingdom of Jerusalem.